the impetus of life, of which we are speaking, 
consists in a need of creation. 
it cannot create absolutely, because it is confronted
with matter, that is to say, with the movement 
that is the inverse of its own. but it seizes
upon this matter, which is necessity itself, 
and strives to introduce into it
the largest possible amount of indetermination 
and liberty.
how does it go to work? 

h.bergson